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Ammonium (NH4N), nitrate (NO3N), soluble reactive phosphate (PO4P), total phosphorus (TOTP), dissolved reactive silicon expressed as SiO2 (SIO2) and phytoplankton chlorophyll a (TOCA) are all given in µg per litre. Water samples are based on a sample integrated from 0 to 5 m. Measurements are made from a boat at a marked location (buoy) at the deepest part of the lake. When it was not possible to visit the buoy, samples were taken from the shore, thus water samples were not integrated on these occasions, marked as Flag 2. All data are from April 1945 until the end of 2013. ","metadataDate":"2018-02-13T10:07:51","resourceIdentifiers":[{"code":"https://catalogue.ceh.ac.uk/id/393a5946-8a22-4350-80f3-a60d753beb00"},{"code":"10.5285/393a5946-8a22-4350-80f3-a60d753beb00","codeSpace":"doi:"}],"resourceStatus":"Current","lineage":"Measurements are made from a boat at a marked location (buoy) at the deepest part of the lake. When it was not possible to visit the buoy, samples were taken from the shore. Water samples are based on a sample integrated from 0 to 5 m. 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